Knife-grinding attachment for threshing-machines.



E. BEESON. KNIFE GRINDING ATTAGHMENT FOR THRBSHING MACHINES. APPLIOATION FILED AUG. 25, 1909.

964,839, Patented July 19, 1910.

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B. BEESON.

KNIFE GRINDING ATTAGHMENT r011 THRESHING MACHINES.

APPLIUATION I'ILED M3645, 1909.

Patented July 19,1910.

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UNITED STATES PATENT OFFICE.

EL BEESON, 0F BENTONVILLE, INDIANA.

Specification of Letters Patent.

Patented July 19, 1910.

Application filed August 25L 1909. Serial No. 514,593.

To all whom it may concern:

Be it known that I, EL BEnsoN, a citizen of the United States, residing at Bentonville, in the county of Fayette and State of Indiana, have invented a new and useful Knife- Grinding Attachment for Threshing-Machines, of which the following is a specification.

This invention relates to new and useful improvements in grinders, more particu larly however, to grinders adapted to sharpen the knives of rotary band cutters in self-feeding threshers.

It contemplates the construction of a de vice of this type and character that will be operated from the cylinder or the knife shaft pulley and may be brought into contact with all of the knives, giving the same a uniform bevel and increasing the utility thereof.

WVith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, all as hereinafter more fully described, specifically claimed and illustrated in the accompanying drawings, wherein Figure 1 is a diagrammatic side elevation of my device applied to a feeder. Fig. 2 is a longitudinal section of the pivotal gear frame and boxing. Fig. 3 is a plan view of my improved device. Fig. 4 is a side elevation of the same. 1

Reference being had to the drawings, the improved grinder forming the subject matter of the present invention comprises a supporting bar 1 connected by the clamping rods 2 to the clamping bar 3, a vertical adjustment of the clamping bar 3 being had through the clamping crank 4 operating on the lower extremity of said clamping rods 2. The feeder sides are engaged between the supporting bar 1 and the clamping bar 3, thus permitting the grinder mechanism to be brought into contact with the rotary band cutters while the same is in operation.

Disposed at each longitudinal extremity of the supporting bar 1 are the standards 5 having at their upper extremities bearings 6. Rotatably mounted in said bearings and provided with collars 7 is a longitudinally extending shaft 8, said shaft having a key seat 9 extending throughout its entire length. To prevent any lateral displacement of the shaft in bearings 6, collars 10 are rigidly secured to the same adjacent each of the bearings by the set screws 11. A

pulley wheel 12 is carried by one extremity of the shaft projecting beyond a bearing 6 and is adapted to be in alinement with the cylinder pulley of the threshing machine and connected therewith by the belt 13.

A gear frame 14L is slidably mounted on the shaft 8 and has the spool bearing 15 in the orifices 16 at the extremity of each arm 18, said spool bearing having the key 17 operating in the key seat 9. In the in termediate portion 19 of the frame 14: is a central opening 20' in which is rigidly carried the tube 21. A shaft 22 is rotatably mounted in the tube 21 and has keyed at its inner end between the arms 18 the beveled gear 23. Mounted on a bushing 2 1 at the outer extremity of the shaft 22 and adapted to rotate therewith is a beveled emery wheel 25, spaced from the extremity of the tube by a collar 26.

Adapted to rotate with the spool bearing 15 and keyed thereon by the set screw 27 is the collar 28 having the beveled gear 29 formed thereon meshing with and rotating the similar gear 23 carried at the inner extremity of the shaft 22. The collar 28 is adapted to bear against the clamps 30 forming the extremity of the arms 18, thus eliminating all lateral movement of the same.

From the foregoing it will readily be seen that connecting the pulley 12 by the belt 13 to the cylinder pulley, the shaft 8 will be rotated and, as a consequence there of, the shaft 22 in the tube 21 will be re-' volved through the instrumentality of the gears 23 and 29, thus rotating the emery wheel 25. Due to the fact that the gear frame 1 1 is slidably mounted upon the shaft 8, the emery wheel may be brought into contact with all of the knives upon the knife shaft.

The construction of the emery wheel 25 is such that a uniform bevel is imparted to the extremities indicated in general as 31 of the band cutters.

The tube 21 is swung manually toward and away from the band cutters and the frame 14: is moved in a similar manner along the shaft 8. When not in use, the tube 21 and its attachments are swung back away from the band cutters.

Having thus fully described my inven- A grinding attachment comprising asupporting bar, a clamping device attached to of the first said shaft but restrained in their swinging movement to a plane at a right angle to the axis of the first said shaft, and an abrading member fixed to the outer end of the shaft journaled in the tube.

In testimony that I claim the foregoing as my own, I have hereto aifixed my signature in the presence of two witnesses.

EL BEESON.

Witnesses:

FRANK W. MARSON, A. D. HOUSE. 

